Why this exists
A short note from the founder
OpenSense is built by one person in Bratislava, Slovakia. Knowing this changes what is on the roadmap and what is honest to promise.
What I am
Solo founder, EU based, EU national, full-stack engineer with a decade of operational software behind me. I run a Slovak entity (s.r.o.), pay Slovak tax, talk to Slovak customers in their language or in English.
What this product is
A telemetry SaaS for small operations that need just enough monitoring evidence to satisfy their inspector, their insurer, or themselves. Not a SCADA, not a Testo replacement, not a hardware vendor.
I picked this product because three things lined up:
- EU food-and-water regulation creates real demand every year that we keep tightening hygiene rules.
- Commodity sensors are now good enough. A €30 Shelly does what a €300 device did in 2018. The bottleneck moved from hardware to software.
- I can build it alone. There is no proprietary chemistry to develop, no calibration lab to run, no sales team to manage. It is an HTTP API and a small dashboard.
What you are buying
A working product, with bug fixes and updates, from a person who will be on the other end of an email. The dashboard has my number on it; if you call, I answer.
You are also buying a single point of failure. If I am unwell or on holiday, response time stretches. The product is set up to run unattended (autoscaling Hetzner, no manual interventions in the common path), and the audit-trail design means your data is safe from my mistakes — but for time-sensitive vendor support, this is a risk to know about.
If your operation cannot tolerate that risk, you should buy from a larger vendor. I will say so to your face. The comparison page tries to be honest about when that vendor is Testo or Eupry.
What I am betting on
That a thousand small European businesses prefer:
- Honest pricing (€29 / month, no per-seat games).
- EU jurisdiction (no US Cloud Act exposure).
- Hardware they choose, not hardware I sell them.
- An audit trail they can verify externally.
- A product that ships when I say it will.
...over a fancier brochure from a multinational. We will find out.
How to contact me
- Email: grande.chuvash@gmail.com
- For non-urgent bug reports: open an issue on the public issue tracker (URL pending — will be linked from the main site once the repo is open).
- For commercial enquiries (chains, MSPs, distributors): email me directly.
This page exists because operators ask, and because I prefer to introduce myself before the first invoice.
— Murzin